kh/hr to erpm
speed_in_kmph= pi*D_in_mm*rpm*60/1000000 = pi*D_in_mm*(erpm/pole_pairs)*60/1000000
erpm= speed_in_kmph*pole_pairs*1000000/(60*pi*D_in_mm)
erpm = 7*10*1000000/(60*pi*110) = 3376
BTW, do you have metr pro/nrf51_vesc on your board? If so give the vesc_tool app a try. Sooo convenient.